Oil saver



Aug. 16, 1932. w. G. BRADFORD OIL SAVER Filed NOV. 24, A1.93()

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/frroR/Vfx Patented Aug. 16, 1932 UNITED STATES PATENT oFF-ICE WILLIAM G. BRADFORD, OF TORRANCEQCALIFORNIA, ASSIGNOR T0 J. E. OLIVER, OF v FULLER'ION, CALIFORNIA oIL SAVER Application led November 24, 1930. Serial No. 497,663.

This invention relates to an oil saver particularly useful in an oil well derrick when a loa-iler, swab, or the like is being used. The oil which collects on the cable supporting the 5 bailer is stripped off and returned into the tubing thereby preventing it from discharging on the floor of the derrick where it is lost.

An object of my invention is to provide a novel oil saver, the stripper head of which contains all of the releasing mechanism, thereby leaving the tubing entirely open for' the tools.

Another object is to provide an oil saver of the character stated, the stripper head of which can be easily and quickly remounted in operative position after it has been carried upwardly by the swab or tools.

Other objects, advantages, and features of invention may appear from the accompanying drawing, the subjoined detailed description, and the appended claims.

In the drawing Figure 1 is a view half in longitudinal section, and half in elevation.

Figure 2 is a bottom plan view of the stripper head with the releasing ring removed.

Figure 3 is a top plan view of the releasing ring.

Referring more particularly to the drawing, the numeral 1 indicates a pipe section which is suitably mounted on the top of the tubing. A stripper head 2 is releasably mounted on the top of the pipe section 1, as will be further described. The stripper head is provided with a central bore 3 through which the cable supporting the tools extends. A packing block 4l is mounted adjacent the upper end of the head, and this packing block presses against the cable to wipe the oil off of the surface. A nut 5 screws into the top of the head against the block 1 for the purpose of compressing the packing block against the cable.

The stripper head 2 is pro-vided with an integral depending apron 6 which fits around the outside of the pipe section 1. An annular groove 7 is formed adjacent the upper end of the pipe section 1 for the purpose of T- holding the stripper head in place, as will be further described. 1 A plurality of latches 8 is pivotally mounted in the stripper head 2, and these latches arev each provided with a li 9 which fits into the annular -groove 7 'thereby holding the stripper head on the pipe section 1.. A coil spring 10 bears against the top of the-latches 8 thereby tending to swing the latches into engagement with the groove 7. rlhe latches are all simultaneously swung inwardly and released from the groove 7 by means of areleasing spider 11. The releasing spider is slidably mounted on a plurality Vof bolts 12 which screw into the stripper head 2.v The heads of the bolts are countersunk into the releasing spider, as shown at 13.y

vA cam lip 14: is providedon the upper outer edge of the releasing spider, the purpose Vof* this lip being to engage each of the latches vand swing themoutwardly when the said spider is pushed upwardlyl by a tool moving upwardly in the tubing. It will be evident that. as the tool strikes the releasing spider, it will push the same upwardly thus causing the cani lip thereof to engage the latchesand swing them into disengagement. The stripper head will then befree and can move-up with the tool without in any way injuring the tools or the head. v

A packing ring 15 is seated around the outside of the pipe section 1, and the apron 6 bears against this packing so as to seal the space between the head and the pipe section. The apron is preferably formed with a tapered seat 16 which bears against the packing, thus pressing the packing tightly between the apronand the pipe section. A hole 17 i may be provided through the pipe section to the inner surface of the packing 15 for the purpose of causing any pressure in the tubingfto press the packing tightly against the apro-n 6. When the stripper head is carried upwardly, all of the releasing and latching mechanisrnmoved with it, and thus the tubingis entirely free and the tools can be inserted therein without difficulty or without striking Vany intricate mechanism. j

Having described my invention, I claim: 1.. An oil saver comprising a pipe section, a stripper head mountedv on the pipe section,

ion

said pipe section having an annular groove adjacent the upper end thereof, a plurality of latches pivotally mounted in the stripper head, said latches being adapted to engage in the annular groove, a releasing spider, a plurality of bolts extending through the releasing spider and into the stripper head, said spider being slidably mounted on the bolts, said spider being adapted to be engaged by the tools whereby said spider is liftedirto release the latches, and springs bearing against said latches whereby the latches are moved into engaged position.

An oil saver comprising av pipe section,`

a stripper head mounted on the pipe section,V said pipe section having an annular groove adjacentthe upper end thereof, a plurality of latches pivotally mounted in the stripper head, said latches being adapted to engage in the annular groove, a releasing spider, a plurality of bolts extending through the releasing spider and into the stripper head, said spider being slidably mounted on the bolts, said spider being adapted to be engaged .by the tools whereby said spider is lifted to release the latches, and springs bearing against said latches whereby the latches are moved*V into engaged position, an integral apron depending from the stripper head, an annular packing ring between the apron and the pipe section, said apron having a tapered seat engaging the packing whereby the packing is pressed against the pipe section.

3. An oil saver comprising a pipe section, a stripper head mounted on the pipe section, a plurality of latches pivotally mounted on the stripper head, on the lower end of said head, means on the pipe section engageable by the latches, a releasing spider, means mounting said spider on the stripper head whereby vertical movement of the spider is permitted, spring means bearing against the latches whereby the latches are moved into engaged position, and a cam lip formed on the spider, said lip engaging the latches to swing the same into non-engaging position.

4. An oil saver comprising a pipe section, a stripper head mounted on the pipe section, said pipe section having an annular groove adjacent the upper end thereof, a plurality of latches pivotally mounted in the stripper head, said latches beingadapted to engage in the annular groove, a releasing spider, a plurality of bolts extending through the releasing spider and into the stripper head, said spider being slidabl mounted on the bolts, said spider being a a ted to be engaged by the tools whereby sai spider is lifted to release the latches, and springs bearing against said latches whereby the latches are moved into engaged position, a camv lip on lsaid spider, said lip engaging the latches to releasesaid latches on upward movement of the spider. j v t 5. An oil saver comprising a pipe section,

kin the annular groove,

a stripper head mounted on the pipe section, said pipe section having an annular groove adjacent the upper end thereof, a plurality of latches pivotally mounted in the stripper head, said latches being adapted to engage a releasing spider, a plurality of bolts extending through the releasing spider and into the stripper head, said spider being slidably mounted on the bolts,

said spider Vbeingadapted to be engaged by the tools whereby said spider is lifted to release the latches, and springs bearing against "said'latches whereby the latches are moved into engaged position, an integral apron depending from the stripper head, an annular packing ring between the apron and the pipe section, said apron having atapered seat engaging the packing whereby the packing is pressed against the pipek section, a cam lip on said spider, said lip engaging .the latches to 4release said latches on upward movement of the spider; In testimony whereof, I alix my signature.- WILLIAM G. BRADFORD.

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